A kojak is predictably sketchy off road. Far from ideal. But it’s just about possible to ride tracks and bridleways if it’s dry and not very steep. If it’s damp, forget it.
Something like the g-one Allround would be nicer off road and about as fast on-road but not as tough or high mileage.
Yeah g-one would be perfect but they don’t do them in 26” ... realistically tyre should be 38-40c to fit on isen and there isn’t much that fits the bill
the kojaks slickness looks "terrifying" ... :/